linux asm(nasm) output strings

section .textglobal mainmain:mov eax,4mov ebx,1mov ecx,msgmov edx,lenint 80hmov eax,1int 80hmsg:db "hello world!it's too long!/n","$",'\r\n\t',0,'12345',lenlenequ $-msg

 nasm -f elf64 demo.asm

ld -emain demo.o -o demo

./demo

hello world!it's too long!/n$\r\n\t12345*

you see:

\r \n \t /n not useful

but

section .textglobal mainmain:mov eax,4mov ebx,1mov ecx,msgmov edx,lenint 80hmov eax,1int 80hmsg:db "hello world!",0xA,"it's too long!/n","$",'\r\n\t',0,'12345',len,0xalenequ $-msg

hello world!it's too long!/n$\r\n\t12345,

oxA -> '\n'

linux nasm-2.13.01 编译器